Guangdong Energy Yulin Chemical has applied for a patent concerning a method for determining energy storage capacity, aimed at enhancing the rationality of electric energy storage capacity determination and reducing waste of renewable energy. The application was filed with the State Intellectual Property Office of China, with publication number CN119944744A, on November 2023.
The patent abstract reveals that it involves a method, apparatus, medium, and equipment for determining energy storage capacity in a system that couples renewable energy with coal chemical processes. The method consists of the following steps:
- Using historical data on hydrogen and steam consumption from the chemical plant to establish the incremental demand rates for hydrogen and steam.
- Determining the hydrogen demand curve for the chemical plant based on the incremental hydrogen demand rate and the planned hydrogen demand curve.
- Establishing the steam demand curve for the chemical plant using the incremental steam demand rate, the planned steam demand curve, and the thermal energy demand curve of the hydrogen production system.
- Formulating an objective function aimed at maximizing the absorption rate of renewable energy, which includes constraints related to hydrogen storage capacity, electric energy storage, power balance, and system operation. The operational constraints must satisfy the hydrogen and steam demand curves of the chemical plant.
- Utilizing optimization algorithms to determine the electric energy storage capacity that meets the objective function.
This approach aims to improve the rationale behind the determined electric energy storage capacity, thereby minimizing the waste of renewable energy sources.
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